/*
 * Copyright (c) 2007 Team and Concepts Limited.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Team and Concepts Limited nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TEAM AND CONCEPTS LIMITED ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL TEAM AND CONCEPTS LIMITED BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.editgrid.api.client;

import org.apache.commons.httpclient.URIException;
import org.w3c.dom.*;
import java.util.*;

public class AtomFeed {
	private List<AtomEntry> entryList = new ArrayList<AtomEntry>();
	private EditGridService service = null;
	private long startIndex = 0;
	private long totalResults = 0;
	private long itemsPerPage = 0;
	private boolean isEntry = false;
	
	protected EditGridService getEditGridService() {
		return this.service;
	}
	
	protected void setEditGridService(EditGridService service) {
		this.service = service;
	}
	
	public boolean getIsEntry() {
		return this.isEntry;
	}
	
	public long getStartIndex() {
		return this.startIndex;
	}
	
	public long getTotalResults() {
		return this.totalResults;
	}
	
	public long itemsPerPage() {
		return this.itemsPerPage;
	}
	
	public List<AtomEntry> getEntries() {
		return this.entryList;
	}
	
	protected static AtomFeed loadXml(Document xmlDocument) throws URIException {
		AtomFeed feed = new AtomFeed();
		
		Element element = xmlDocument.getDocumentElement();
		if (AtomUtil.isAtomElement(element, "entry")) {
			AtomEntry entry = AtomEntry.loadXml(element);
			feed.entryList.add(entry);
			feed.isEntry = true;
		} else if (AtomUtil.isAtomElement(element, "feed")) {
			NodeList nodeList = element.getChildNodes();
			for (int i = 0; i < nodeList.getLength(); i++) {
				Node node = nodeList.item(i);
				if (node.getNodeType() == Node.ELEMENT_NODE) {
					Element e = (Element) node;
					if (AtomUtil.isAtomElement(e, "entry")) {
						AtomEntry entry = AtomEntry.loadXml(e);
						feed.entryList.add(entry);
					} else if (AtomUtil.isOpenSearchElement(e, "totalResults")) {
						feed.totalResults = Long.parseLong(e.getTextContent());
					} else if (AtomUtil.isOpenSearchElement(e, "itemsPerPage")) {
						feed.itemsPerPage = Long.parseLong(e.getTextContent());
					} else if (AtomUtil.isOpenSearchElement(e, "startIndex")) {
						feed.startIndex = Long.parseLong(e.getTextContent());
					}
				}
			}
		} else {
			throw new IllegalStateException("Not a valid Atom feed");
		}
		
		return feed;
	}
}
